The first in the bestselling interactive picture book series about a dinosaur and his best friend Max - with real, fold-out letters to read

After a trip to the museum, Max writes a letter to his favourite dinosaur, the mighty T. Rex - and the T. Rex writes back!

As Max and T. Rex learn about each other's lives, a very unusual friendship develops in this funny and touching story from an award-winning duo.

• Dinosaur fans will love this interactive picture book with letters and cards to open
• Dinosaur facts to discover along the way
• Brilliantly colourful illustrations throughout